ISPRS Workshop on Service and Application of Spatial Data Infrastructure, XXXVI(4/W6), Oct.14-16, Hangzhou, China 
170 
and to evaluate the practical character. The DMBS and network 
technical method are the very basic supporting techniques of 
planning information process for digital urban planning. Some 
other technical methods, especially forecasting analysis method 
are used for information processing too. 
4.3 Planning Information Expressing 
Planning information expressing here means two aspects. While 
one is the contents of planning results, and another one is the 
expression of planning information. As you know, the planning 
results of traditional urban planning are for physical and social 
planning, and there are only two ways to express, such as 
planning documents and planning maps. Whereas the planning 
results of digital urban planning are not only for physical and 
social, but also for technical and information. Ant the results 
will be expressed in many different ways related to digital city 
technology, such as digital planning document, digital planning 
maps, planning information database, and three dimensional VR 
models. It is not only technical intensive, but also very helpful 
for planning implementation and management. 
The techniques to support planning information expression 
include digital document processing technology like word and 
digital map producing. Besides that, the three dimensional 
visualization techniques like VR will be widely used for 
expressing digital urban planning results. And the planning 
information database will be the new input of city spatial data 
infrastructure supported by DBMS technology. Meanwhile, the 
planning results will be released widely by means of network 
based on web-GIS. 
5. CONCLUSIONS 
To sum up this research, four conclusions were worked out. 
First one is that the digital urban planning is the future urban 
planning along with the development of digital city. Second one 
is that digital urban planning is a newly urban planning for 
digital city supported by information infrastructure, spatial data 
infrastructure, and urban planning and managing information 
system of digital city. Third one is the content of digital urban 
planning, which includes two aspects — physical and social 
planning for realistic city, and technical and information 
planning for digital city. Fourth one is the system of technical 
methods for digital urban planning, which is consisted of three 
categories, planning information acquisition technical method, 
planning information process technical method, and planning 
information expression technical method. 
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ACKNOWLEDGEMENTS 
This research is part of our project (JC2001002) supported by 
basal research grant (BRG) of Tsinghua University. Thanks for 
all scholars involved in the project.